/* * Copyright 2020 Red Hat Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include <nvif/timer.h> #include <nvif/device.h> s64 nvif_timer_wait_test(struct nvif_timer_wait *wait) { u64 time = nvif_device_time(wait->device); if (wait->reads == 0) { wait->time0 = time; wait->time1 = time; } if (wait->time1 == time) { if (WARN_ON(wait->reads++ == 16)) return -ETIMEDOUT; } else { wait->time1 = time; wait->reads = 1; } if (wait->time1 - wait->time0 > wait->limit) return -ETIMEDOUT; return wait->time1 - wait->time0; } void nvif_timer_wait_init(struct nvif_device *device, u64 nsec, struct nvif_timer_wait *wait) { wait->device = device; wait->limit = nsec; wait->reads = 0; }